Dynamo-electric machine



Nov. 5, 1935. E, GUTJAHR- 2,020,258

DYNAMO ELECTRIC MACHINE Filed Aug. 4, 1934 Patented Nov. 5, 1935 UNITED STATES PATENT OFFICE a-ignosmany,

sehai'a stattgartGes-mny ApplicationAagnstd.llM,8esialN 788,556 Dimming-8.10:3

Gal-s.

The present invention relates to Improvements 1 in dynamo-electric machines oi the type having ailxedarmatureand magnetsystemandarotary iiux conductor piece. 5 The object oi this invention is to'provide a cheap construction suitable for robust work.

According to the present invention'the armaturesystem ismountedonthe coveroithemachineandservesasasupportingmcansandalso m simultaneously as a means oi connecting the cover and the machine casing. I

The invention is more particularly described with reference to the form oi construction shown in the accompanying drawing in which:-

Figure l is an electric current-producing device in sectional elevation. and

l'igurezisacorrespondingplanview. I The dynamo-electric machine consists of a number 0! armature cores 0 of H-shape. which areprovidedwithwindingsandareequaliyspaced from one another, around-a circle; it also includes bar magnets b which lie between the armature cores and a iiux conducting piece e which rotates within the armature cores. The armszs ture cores are connected with the never e by means of threaded'bolts d andnuts p.

The bolts project beyond the armature cores and pass through the side of a pot-shaped casing .Iwhichenclosethearmaturecoresandthemagso nets. Nutsgontheboltendssecurethecasing and the cover-plate together. In order to secure thebarmagnetsilrmlyuponthearmaturecores. inclined surfaces h are provided on the coverplate against whichthe outercdgesoi' themagss netsabut. Screwsiaresecuredinthecasingf whichbythesemagnetsaretorcedagainstthe inclined surfaces and consequently pressed inwardiyagainst thearmaturecores. Then-maturecoreslieatboth endsoncircular suri'acesk 40 o! the casing and cover-plate and are consequently thereby'sccm'ately centered so that the air gap between the cores and the flux conducting piece remains small. The iiux conducting pieceismountedinbearingsminthecover-plate 46 andinthecasing. 'ihecover-platehasalsoa recess n in which a. distributor board o-ior connectionoiconductorstothewindingendsis mounted.

I declarethatwhatlclaimis:

50 l. A dynamo-electric machine comprising in combination a flxed armature system, a tired magnet system, a rotary flux path piece co-opcrating therewith. a casing enclosing said armature system. a cover-plate supporting said m ture system, smi common means for seeming said casing to said cover-plate and for securing said armature system upon said cover-plate.

2. A magneto for dynamo-electric machines, comprising ailaed armature system. a ilxed msgnet system having inclined ends. a rotary flux path conductor piece, a cover-plate. inclined suriaces on said cover-plate against which the outer edges of said magnets abut, a casing-enclosing said armature system and magnet system, common'means for securing said casing and said it armature system to said cover-plate, and means to force said magnet system against the inclined surfaces or said cover-plate.

3. A dynamo-electric machine comprising in combination a plurality of armatures disposed ll about a circle, a plurality oi windings-thereon, aiplurslity of magnets associated therewith. a rotary flux-conducting piece, a cover-plate. a cadng enclosing said srmatures. windings, magnets snd said conductorpicce and common means m for securing said casing to said cover-plate and for securing said armatures to said cover-plate.

4. A dynamwelectric machine, comprising in combination a plurality of armatures disposed about a circle, a. plurality of magnets co-operst- :8 ing therewith. a rotary iiux conductor piece, a cover-plate, a pot-shaped casing. common means so: securing said pot-shaped casing to said coverplate.andiorsecm'ingsaidsrmaturestcsaid cover-plate.

5. 'A dynamo-electric machine. comprising in combination a plurality of armatures disposed about a circle, a plurality oi magnets co-operat-* ing therewith. a rotary ilux conductor piece, a cover-plate, a pot-shaped casing. common means 35 ior securing said pot-shaped casing to said coverplate. and for securing said armatures tossid cover-plate. and means carried by said casing and said cover-plate for centering said armatur'es relatively to said rotary ilux conductor piece. 6.-A dynamo-electric machine comprising in combination a cover-plate, bolts mounted thereon. armatures having coil windings supported'by saidimitauiagnctsassociat'edwithm.idwiridinst. an enclosing casing for said windings. nuts onsaidboltssecuringsaldwindings a set of nuts on said bolts for securing said casing to said cover-plate.

7. A dynamo-electric machine comprising in o combination a cover-plate. bolts mounted thereon,-armatures having coil windings supported by said bolts, magnets associated with said windings. an enclosing casingfor, said windings. nuts on said bolts securing said windings thereto. and a u second set oi nuts on said bolts for securing said casing to said cover-plate.

8. A dynamo-electric machine comprising in combination a fixed armature system, a fixed 5 magnet system, a rotary flux conductor piece cooperating therewith, a casing enclosing said armature system and having a cover plate, common means i 'or securing said casing to said cover plate and for securing said armature system upon said cover plate, and means carried by said casing cooperating with means carried by said cover-plate to secure said magnet isystem in engagement with said armature system.

IMIL GUTJAHR. 

